Home / 138,581.84-191,240.47-78,152.60

Finding the Fourth Proportional to 138,581.84, 191,240.47 and 78,152.60

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Solution

The fourth proportional to 138,581.84, 191,240.47 and 78,152.60 is: 107,849.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.84 : 191,240.47 = 78,152.60 : x
  2. Step 2: Convert to fraction form
    138,581.84/191,240.47 = 78,152.60/x
  3. Step 3: Cross multiply
    138,581.84x = 191,240.47 × 78,152.60
  4. Step 4: Simplify right side
    138,581.84x = 14,945,939,235.98
  5. Step 5: Solve for x
    x = 14,945,939,235.98/138,581.84
  6. Step 6: Final answer
    x = 107,849.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.